Hot Rats is Frank Zappa's first official solo album released in 1969 and it is a masterpiece of instrumental jazz rock. The guitar solos alone are stunning and the songs are highly melodic, even my wife was humming along to "Son of Mr Green Genes".
Ian Underwood adds reeds, flute and keyboards to all of the tracks and there is a cameo appearance by Captain Beefheart. This is not an album of aimless jamming but a superbly crafted, beautifully arranged and intelligent work of art. If you are yet to take the plunge into planet Zappa please do not hesitate to dive into this one first.